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Ultrasound helps predict placenta accreta.(Obstetrics)
WASHINGTON -- Characteristic findings on transabdominal ultrasound and color mapping help predict placenta accreta, Thomas C. Woodring, M.D., said at the annual meeting of the Central Association of Obstetricians and Gynecologists.
Diagnosing the condition before delivery allows the patient and the delivery team to prepare for the likelihood of severe hemorrhage necessitating curettage, hypogastric vessel ligation, or hysterectomy, said Dr. Woodring of the University of Mississippi Medical Center, Jackson.
Although the precise etiology of the condition is unknown, placenta accreta can occur after "any process or procedure capable of scarring the endometrial cavity," predisposing to anomalous myometrial invasion by the placental villi. These include grand multiparity; Asherman's syndrome; and previous cesarean delivery, uterine curettage, myomectomy, or uterine reconstructive surgery. "Particularly disturbing is the nearly 40% rate of accreta in women with two or more cesarean deliveries and a central previa," Dr. Woodring noted.
He and his associates reviewed 5 years of ultrasound reports from their hospital in cases where placenta accreta was suspected prenatally. There were 12 such cases out of 31,083 ultrasound studies.
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